On my new desktop machine I'm having dual monitor setup. Sometimes one of monitors gets black for a second and then shows image again - this happens when mouse cursor goes from one display to another. Also, when running an OpenGL application, if it starts on one specific monitor, the whole screen flickers quite badly with random rectangles starting at mouse cursor position. If same app starts on another monitor, no flashing occurs. Vulkan demo apps also don't exhibit flashing. This happened when one monitor is connected to DP, while the other on HDMI. Using different connections, e.g. DP 1.2 with two monitors chained, I couldn't reproduce the flashing, but still, each of them can go black intermittently.
OS: Ubuntu 16.10 64-bit Kernel: 4.8.0-26-generic CPU: Intel Core i7 6700K GPU: HD Graphics 530 (Skylake GT2) Multi-monitor setup, where one monitor is in portrait orientation. Note that I haven't experienced any of this issues on exactly same monitor setup, but Haswell 4790K setup and Xenial (Xenial on my Skylake machine doesn't work with aforementioned monitor setup at all). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1634449 Title: Black flicker when leaving monitor Status in linux package in Ubuntu: Triaged Bug description: Sometimes, when moving cursor from one monitor to the other, the external monitor turns black and gets back on again. The hardware is Dell Latitude E5470 with Docking Station and monitor connected via DisplayPort (checked both ports and happens on both of them). Everything worked correctly on Ubuntu 16.04, but it happens on Ubuntu 16.10. Kernel 4.8.0-25-generic. The bug isn't related to cursor only, if focus changes by alt+tab it sometimes happens as well. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1553503 This is the same bug as this one, but closed. --- ApportVersion: 2.20.3-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: vessel 5602 F...m pulseaudio /dev/snd/controlC0: vessel 5602 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.10 HibernationDevice: RESUME=UUID=56fab9c8-7226-47b9-91cb-a2c865f81bc0 InstallationDate: Installed on 2016-08-31 (47 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: Dell Inc. Latitude E5470 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-25-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.8.0-25.27-generic 4.8.1 RelatedPackageVersions: linux-restricted-modules-4.8.0-25-generic N/A linux-backports-modules-4.8.0-25-generic N/A linux-firmware 1.161 Tags: yakkety Uname: Linux 4.8.0-25-generic x86_64 UpgradeStatus: Upgraded to yakkety on 2016-10-14 (3 days ago) UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 06/15/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.7.3 dmi.board.name: 0P88J9 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.7.3:bd06/15/2016:svnDellInc.:pnLatitudeE5470:pvr:rvnDellInc.:rn0P88J9:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E5470 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1634449/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
